title: Genetics of inbred Drosophila melanogaster. VI. Crossing-over in secondary non-disjunction exceptionals.
mesh_terms: D000818:Animals; D003433:Crosses, Genetic; D003434:Crossing Over, Genetic; D004331:Drosophila melanogaster / Q000235:genetics*; D005260:Female; D008297:Male; D011995:Recombination, Genetic; D012730:Sex Chromosomes / Q000648:ultrastructure